if you are doing a system without a pronto then you are probably using very low end equipment, TV included. There are alot of TV manufacturers out there that are not using "true" component inputs in their televisions, that is, they are taking the three rca inputs and passivly converting them to S in order to save money. Joe Kane addressed this in one of his seminars at CEDIA this year. If you are unfortunate enough to be using one of "those" televisions then there will be no visible difference between component and S, infact you probably will notice that S looks better! I think this will start to become a much bigger issue as more and more people start to realize it. That said, if you are using a worthy display device (in which case you probably would have a pronto any way) then most people notice some difference, especially in the color saturation, and overall deffinition and depth to the picture.